I've been following your process long enough to realize that a change does not mean "better" or "worse". It's a change for experience and enjoyment of the hobby.
Most of us who try to benefit from those on the forum with greater experience, try to put the various comments in perspective. In the past, you've listed speakers and subs in order of your preference. That's easy to follow. What's harder to do is understand the gap or spread in those preferences. You could believe that the big JBL's (at the top of your list) made the speakers at the bottom of the list sound like toys.
Based on the experience I've had, I always felt like the bottom of my list was fairly close to the top. Not in all aspects, but in the overall enjoyment or experience.
Through MK's experiences, there's usually been a progression "up" the chain. This latest change back to the 5000's is the first that I've seen you go back to the beginning for a "re-evaluation". This gives the first opportunity to understand how close the gap might be in the progression.
For instance, the photos you had with the larges subs and largest JBL's compared to the current photo. There's an expectiation that the visual gives me that really doesn't translate into performance. Well, it does, but not the the extent that your imagination starts to formulate.